Yes, that’s the general idea. I’m a little surprised that Fedora doesn’t recognize your RAID 5 array at all. Make sure you don’t have the drives hooked up to a RAID controller on your PC, just normal everyday SATA ports. For as much as I use Ubuntu, I’ve done very little with RAID or logical volume management aside from adding dropped drives back into arrays.
The GNOME Disk Utility (formerly called Palimpset, but probably listed in the menus as Disk Utility) may shed a little extra light here. Just be really careful not to change anything on the drives themselves until you can run data recovery software.
